题干

依据图①~③,下列说法错误的是(  )

A:图示①②虽然形态不同,但其基本结构相同

B:图示①②③的基本结构中都有线粒体和叶绿体

C:图示②③的主要区别是③有细胞壁、液泡、叶绿体,②没有

D:图示①②③都是构成生物体的基本单位

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答案(点此获取答案解析)

B

同类题4

阅读理解

    As a new driver with little experience behind the wheel, having to turn into another lane(车道)to avoid a careless driver talking on a cellphone is not something that I am prepared for. According to the New England Journal of Medicine, an accident is four times more likely to happen than normal while you are talking on the phone. Therefore, I hold the view that using a cellphone while driving should be outlawed(宣布……不合法).

    Cars are two-ton weapons and should be treated as such. When drivers put a key in the engine, they are taking on the responsibility of being a driver. Answer the phone while driving is like taking the safety off a gun ― at any moment something could go wrong and change a life forever.

    A few countries, including Australia, Great Britain, Spain and Israel, have recognized the damage that cellphone use can cause. According to Tom Alex of The Des Moines Register, people who talk on cellphones while driving are just like drunk drivers. They are likely to make a deadly mistake, causing them to hurt themselves or someone else.

    Some may think that cellphone are helpful when you need directions or are in an emergency situation. Although I agree, I believe the safest way to use your phone is to pull over to the side of the road first. Some may think that hands-free phones are less dangerous, but studies have shown that the danger remains the same with these.

    Using a cellphone while driving should be outlawed. One small mistake could change your whole life. Please don't let that happen ― stay off your cellphone while driving.